I try to keep my RPM's as low as possible, but high enough to stay in the power curve. It's unfortunate that the most efficient speed from my CRD is 45 MPH, but I live in an area where I do a lot of driving at that speed - and with very few hills. So I have an advantage there.

I'm super finicky about my tire pressure. I removed my radio antenna. I avoid using the brakes. I try to use a "pulse and glide" style of driving but with the auto it really doesn't work as well as with a manual. I change my fuel filter every other oil change. I add Power Service to every tank. I"m thinking of bigger tires - from 29.5" to 31" diameter would theoretically gain 5% MPG if rolling resistance does not increase.

You must have the special super edition CRD to be getting those numbers....in some aspects it is impossible, 5 speed transmission, gearing, 32" tires, aero of a brick. At 75 mph you are turning well over 2500 rpms...again on paper it is not possible.

The threads about mpg are funny. I find that most numbers are questionable no matter what vehicle or forum. Im not going to spend $900 for a small mpg bump. I dont have to because I found a way to get huge mpg increases, better than GDE tune and nore environmentally friendly.

I got more than 25% mpg increase with just a few modifications.

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Just go to N. California and get a long hair, they will do just about anything for a 6 pack. We got huge MPG increases in our 78 Scout. Now we just need to look for similar motor for our Jeep.

My wife and I average between 26-29 in about 70/30 mixed highway to city driving. Jeep is doing great. She never turns off the a/c. Usually lets it idle to cool off first. It's very hot here in South Alabama.
Love the way our Jeep runs with the eco tune/with dpf delete. The gear change is awesome as well. It truly is the way Jeep should have made all the 2wd vehicles.
With mileage though, nothing is beating my 13' Passat tdi 6 speed. It gets 45-50 but is kind of weak compared to the Jeep. The Jeep is so powerful with this Feels much more powerful than the 5.3L in my truck.

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Just go to N. California and get a long hair, they will do just about anything for a 6 pack. We got huge MPG increases in our 78 Scout. Now we just need to look for similar motor for our Jeep.

You must have the special super edition CRD to be getting those numbers....in some aspects it is impossible, 5 speed transmission, gearing, 32" tires, aero of a brick. At 75 mph you are turning well over 2500 rpms...again on paper it is not possible.

There is a member on here who has done a rear gear swap on his 2wd CRD with the ECO tune and I believe he may get those numbers, but again he has done a gear change.

Scratching my head on this one....

Smyrna Ga to Palm Coast Fla in the spring I got 27.7 mpg on the trip down at 70 mph. No stops and no traffic jams. The same trip on the way back was 27.4 mpg. Another trip from Smyrna ga to Bradenton Fla It got 25.6 mpg going down and 26.4 on the return trip. Both ways at 70 mph. The second trip was with a/c running. The first trip was without a/c. A few areas along the way the speed limit drops to slower speeds for congested areas or construction. So in all fairness the over all avg mph was probably closer to 65 mph. I don't accelerate fast and drive like an old fart. All averages are hand calculated. I filled the tank before getting on the hwy and stopped to fill the tank immediately after getting off the hwy on both trips. So there is virtually no stop and go traffic in these trip figures. I can't explain why it does so well, but I am not gonna complain about it. I got a bit over 25 mpg at 70 mph when the GC was stock.